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Table 6 Comparison of geometric means (GM) of proportionate hole index (pHI) of different locations of LLINs by age and LLIN type for LLINs with complete follow-up (n = 274)

From: A longitudinal study of the durability of long-lasting insecticidal nets in Zambia

Age in months Part of LLIN GM (95 % confidence intervals [CI])
PermaNet® Olyset® All nets
12 Roof 0.3 (0.1–0.6) 0.3 (0.1–0.5) 0.3 (0.1–0.5)
Upper half 0.4 (0.2–0.8) 0.5 (0.2–0.9) 0.5 (0.3–0.7)
Lower half 0.8 (0.5–1.3) 1.0 (0.6–1.5) 0.9 (0.6–1.3)*
Seams 0.2 (0.02–0.3) 0.1 (0.007–0.2) 0.1 (0.05–0.2)
18 Roof 0.8 (0.4–1.2) 2.6 (1.3–4.6) 1.3 (0.8–1.9)
Upper half 1.1 (0.6–1.7) 2.1 (1.2–3.2) 1.5 (1.1–2.1)
Lower half 14.3 (8.9–22.6) 13.3 (8.4–20.8) 13.8 (9.9–19.0)*
Seams 0.5 (0.2–1.0) 1.1 (0.5–1.7) 0.8 (0.5–1.2)
24 Roof 1.2 (0.7–1.9) 3.1 (1.9–4.9) 2.0 (1.4–2.8)
Upper half 3.3 (2.1–5.1) 5.0 (3.1–7.8) 4.1 (2.9–5.6)
Lower half 34.4 (22.2–53.1) 26.6 (16.8–41.9) 30.3 (22.0–41.4)*
Seams 1.1 (0.6–1.8) 1.0 (0.5–1.7) 1.1 (0.6–1.5)
30 Roof 0.1 (1.4–3.3) 4.6 (2.9–7.1) 3.2 (2.3–4.4)
Upper half 7.6 (4.7–12.0) 7.9 (4.9–12.5) 7.9 (5.6–10.7)
Lower half 54.0 (34.2–85.1) 57.7 (37.1–89.4) 55.8 (40.6–76.6)*
Seams 1.0 (0.5–1.6) 1.5 (0.8–2.4) 1.2 (0.8–1.7)
  1. * lower half versus other parts of the LLIN, p < 0.001